Armstrong Teasdale > London, England > Firm Profile

Armstrong Teasdale
38-43 Lincoln’s Inn Fields

Corporate and commercial > M&A: smaller deals, up to £50m Tier 2

Armstrong Teasdale regularly works with an array of private and listed companies on lower mid-market deals, both domestically and internationally. Practice head Peter Kohl is a highly experienced dual-qualified (UK and US) adviser, whose recent highlights include cross-border corporate transactions for clients in the energy, mining and engineering sectors. Martin O’Donoghue‘s broad M&A practice spans the fields of healthcare, biotech, fintech and hospitality, while Yvonne Costello is noted for her extensive experience in restructurings and reorganisations. Coral Yu works on M&A, private equity and capital markets transactions, and is also recommended for cross-border matters.

Practice head(s):

Peter Kohl

Other key lawyers:

Martin O’Donoghue; Yvonne Costello; Coral Yu

Key clients

Applegreen Plc / Welcome Break



United Oil &Gas Plc

Victoria Oil & Gas Plc

Rurelec Plc

Pembridge Resources Plc

Columbus Energy Resources Plc

Work highlights

  • Advising Scorpius on the acquisition of the entire issued share capital of a Jersey company with a UK subsidiary.
  • Advised Columbus Energy on an all-share merger with Bahamas Petroleum Company PLC.
  • Advised UOG on the acquisition of Rockhopper Egypt Pty Ltd from Rockhopper Exploration PLC.

Corporate and commercial > Equity capital markets – small-mid cap Tier 4

US firm Armstrong Teasdale acquired Kerman & Co in February 2021 and therefore inherited its equity capital markets practice. Noted for its particular strength in undertaking issuer-side mandates, the group is highly active in AIM listings and secondary fundraises; it is also sought out for advice on Main Market and Aquis Growth Market IPOs and follow-on offerings and handles public M&A work. Joan Yu and Peter Kohl jointly lead the team, which is heavily involved in mandates connected with the energy and natural resources industries (particularly oil and gas and mining work). The technology, financial services and chemicals industries are among other areas of activity for the group.

Practice head(s):

Joan Yu; Peter Kohl

Other key lawyers:

Coral Yu


A great team – very responsive and commercial.’

Joan Yu – I00% reliable. Attentive, commercial and gets things done.’

Key clients

Applegreen Plc

Baron Oil Plc

Columbus Energy Resources Plc

Empyrean Energy Plc

Metals Exploration Plc

Pembridge Resources Plc

Rurelec Plc

United Oil & Gas Plc

Victoria Oil & Gas Plc

Samarkand Group Plc

Work highlights

  • Advised AIM-listed Columbus Energy Resources PLC (Columbus), an oil and gas exploration and production company focused on onshore Trinidad and Suriname, on a £25m all-share merger with AIM-listed Bahamas Petroleum Company Plc (BPC) which was implemented by a Court-sanctioned scheme of arrangement (Scheme) under Part 26 of the Companies Act 2006.
  • Advised cross-border e-commerce technology and retail group Samarkand Group PLC on the admission of its ordinary shares to trading on the APEX segment of the Aquis Growth Market and its oversubscribed fundraising of £17m.
  • Acted for longstanding client Baron Oil Plc, the AIM-quoted oil and gas exploration company, on its fundraising of £3m to increase its interest in its Chuditch PSC project and to complete the Chuditch PSC work programme, to arrive at a drilling decision.

Dispute resolution > Commercial litigation: mid-market Tier 4

US-headquartered firm Armstrong Teasdale acquired Kerman & Co in February 2021, which resulted in it inheriting the latter firm’s commercial litigation practice. The department, which is led by Robert Paydon, has a strong presence in the natural resources, pharmaceuticals and sports industries. In addition, a significant portion of the work undertaken by the firm has an international flavour and involves acting for private clients/ultra-high-net-worth individuals and family offices; Robin Pickworth is a key contact for these types of clients. James Thorndyke‘s workload includes cases involving sports law, contractual claims, shareholder disputes and negligence actions. Senior counsel Andy Kerman has longstanding experience in corporate litigation. Providing further key support are ‘very experienced senior associateSarah Weindling and ‘highly respected associate solicitorEmma Shaw.

Practice head(s):

Robert Paydon


Nimble and well-resourced, this is a standout firm for complex international commercial litigation.

Genuinely client focused and always determined to achieve the best commercial outcome, I wouldn’t hesitate to recommend them to anyone involved in difficult commercial disputes.

The team provides an excellent City of London service at highly competitive rates.

Robert Paydon has been very responsive and understands my needs.

Robin Pickworth is the perfect all-round litigator. Very good on the law, attentive, great with clients and excellent on strategy. A thoroughly nice guy and very easy to work with, I have recommended him to a number of colleagues and clients.

James Thorndyke is an excellent partner.

Sarah Weindling is a very experienced senior associate with great attention to detail.

Associate solicitor Emma Shaw is a highly respected junior practitioner, who performs well above her QE.

Key clients


Purple Surgical

SC Johnson

The All England Lawn Tennis Club (Championships)


Miss World

Petrosaudi Oil Services (Venezuela)

Melford Capital

Unichem Laboratories

Work highlights

  • Acting for Purple Surgical in a variety of high-value commercial disputes, arising from the supply of personal protective equipment during the COVID-19 pandemic.
  • Acted for Abdoulaye Ndiaye in a hotly contested dispute concerning the purchase of $53m of emeralds and the acquisition of a 50% stake in an emerald and beryl mine in Zambia.
  • Acted for PetroSaudi Oil Services (POS) in resisting a de novo inter partes application by PDVSA Servicios to continue an injunction, which it obtained ex parte against Clyde & Co in 2020 without joining POS.

Projects, energy and natural resources > Mining and minerals Tier 4

Armstrong Teasdale has extensive experience across the mining and minerals sector, and regularly advises AIM-listed companies on corporate matters and financings, including commercial contracts and equity financing transactions. Peter Kohl leads the team. Una Deretic has considerable international experience, and is recommended for advising on cross-border project transactions in emerging markets. Joan Yu is the capital markets contact and focuses on Asia.

Practice head(s):

Peter Kohl

Other key lawyers:


‘Joan Yu has long and very practical experience in the oil and gas and mining sectors, especially AIM listings and transactions. Joan is always available, offers solutions quickly and smoothly and actually cares about her clients.’

‘Una Deretic is outstanding in corporate, M&A and restructuring matters, and is brilliant at seeing through complex deals and drafting workable and enduring contracts.’

‘Peter Kohl provides focused advice on corporate, M&A and compliance issues, and is a mining and oil and gas specialist.’

Key clients

Jade Resources Limited


Gerald Metals Groups

Highcountry Cameroon Limited

Metals Exploration Plc

Pembridge Resources Plc

Work highlights

  • Advised Pembridge Resources, a mining company listed on the main market of the London Stock Exchange, on the restructuring of its joint venture (Minto Explorations), which operates a copper mining business in Canada.
  • Acting for a high-net-worth individual in a dispute concerning the claimant’s purchase of $53 million of emeralds and the acquisition of a 50% stake in an emerald and beryl mine in Zambia.

Projects, energy and natural resources > Oil and gas Tier 4

Armstrong Teasdale acquired Kerman & Co in early 2021, which strengthened its ability to advise oil and gas clients on public and private M&A, debt and equity finance, commercial contracts and disputes. The team, which is jointly led by Peter Kohl and Joan Yu, also includes Coral Yu and Una Deretic. In addition, other key individuals are Anthony Kerman and Robert Paydon , who are sought after in international arbitration matters. Insolvency and restructuring head Imran Aslam recently joined from Fried, Frank, Harris, Shriver & Jacobson LLP.

Practice head(s):

Joan Yu; Peter Kohl

Other key lawyers:

Key clients

Applegreen Plc

United Oil & Gas Plc

Victoria Oil & Gas

Columbus Energy

Resources Plc

Baron Oil Plc

Empyrean Energy Plc

Work highlights

  • Advised AIM-listed Columbus Energy Resources PLC (Columbus), an oil and gas E & P company focussed on onshore Trinidad and Suriname, on a £25 million all-share merger with AIM-listed Bahamas Petroleum Company Plc (BPC).
  • Acted for Baron Oil PLC, the AIM-quoted oil and gas exploration company, on its fundraising of £3m to increase its interest in the Chuditch PSC project and to complete the Chuditch PSC work programme and arrive at a drilling decision.
  • Instructed by PetroSaudi Oil Services (Venezuela) Limited (POS) to resist the de novo inter partes application by the Claimant, PDVSA Servicios S.A. (PDVSA) to continue an injunction which it obtained ex parte on 4 August 2020 without joining POS.

Employment > Immigration Tier 6

US firm Armstrong Teasdale moved into the London market in February 2021 through its acquisition of legacy Kerman & Co. The deal gifted the US firm with a UK immigration practice, which advises corporates from industries including sports, retail and healthcare, as well as private clients.  The tie-up means clients now have access to US immigration advice,  in addition to UK capabilities around global talent visas, the EU settlement scheme and Brexit.

Practice head(s):

Ben Xu


‘The team’s commitment to learning is exceptional, with some really helpful calls on Brexit and immigration rules and what we need to do as private companies.’

‘Ben Xu is extremely nice to clients, not to mention he can speak Chinese. His professional, considerate advice and up-to-date knowledge benefit clients a lot. He responds to clients’ queries at all times, which also leads to his standing out from competitors.’

‘Ben Xu is excellent in delivering good work to clients. He is strong in his legal knowledge and able to give the right to-the-point advice to clients. He was able to deal with complicated legal cases and also act quickly.’

‘Ben Xu is not only an experienced lawyer but is also extremely approachable. He has a great working knowledge of immigration law and is committed to finding the best solution for his clients. He is a pleasure to work with and his tireless dedication to finding a positive solution always ensures his clients are satisfied.’

Key clients

HSF Health Plan


Econet Investments Ltd

TMT (technology, media and telecoms) > Sport

US firm Armstrong Teasdale moved into the UK market with the acquisition of Kerman & Co in February 2021. The firm’s London sports team provides an ‘excellent blend of commercial awareness and in-depth sports sector knowledge’. A key point of differentiation for the practice is its expertise in ticketing affairs which has seen it drawn in by governing and event bodies to oversee development on legislation targeting ticket touting. Zane Shihab, known for his ‘quick, clear and useful advice’, fronts the department and is also reputed within the market for his sponsorship, broadcasting, image rights and venue agreement expertise. James Thorndyke is the key name for contentious matters, particularly regulatory and disciplinary issues, and is ‘tireless in getting the right results’. Nick Bitel, the chief executive of the London Marathon and former chair of Sport England, serves as a consultant to the firm.

Practice head(s):

Zane Shihab

Other key lawyers:


‘An excellent blend of commercial awareness and in-depth knowledge of the sports sector.’

‘I have worked with James Thorndyke on ticketing matters and he is tireless in getting the right result for his client.’

‘The Armstrong Teasdale team is a very well established outfit with some first-class clients. They provide a very nimble and efficient service.’

‘The particular team of senior James Thorndyke and junior Emma Shaw are excellent: showing great legal acumen and attention to detail, as well as outstanding commercial sense.’

‘James Thorndyke is very personable, good with clients, and very commercial in his outlook.’

‘The team go above and beyond to help with providing good and efficient legal advice. The practice has provided bespoke training on occasions which has been very useful.’

‘Zane Shihab in particular provides quick, clear and useful legal support across a range of commercial and sporting matters.’

Key clients

All England Lawn Tennis Club (Championships) Limited (Wimbledon)

Union des Associations Europeennes de Football (UEFA)

London Marathon Events Limited

Rugby Football Union (RFU)

London & Surrey Cycling Partnership (known as RideLondon)

World Marathon Majors

Welsh Rugby Union

Racehorse Owners Association

W Series

Pit Stop Brand Consultancy Limited

Miss World Limited

Horsemen Limited

Truvis Limited

Work highlights

  • Advised the All England Lawn Tennis Club on the implications of the cancellation of Wimbledon, both pre- and post-abandonment.
  • Supporting UEFA on a number of matters in respect of the hosting of Euro 2020, including advising on the ticketing terms and conditions and obtaining/coordinating advice across Europe, drafting and negotiating circa 50 hospitality and concessionaires agreements relating to the stadia across Europe and advising on, and drafting the Covid-19 codes of conduct relation to players, officials, accredited persons and spectators.
  • Advising Michael Gott, founding partner of Profile Partner, a market leading agency that buys and sells sports rights, on litigation concerning his exclusion from the company.

Employment > Employers

Missouri-based Armstrong Teasdale acquired Kerman & Co, giving greater international heft to the legacy London firm’s employment offering, which is led by Jonathan Bruck.
Nick Bitel photo Nick BitelNick is known as one of the best sports lawyers in Britain…
Jonathan Bruck photo Jonathan BruckJonathan is a Partner and Head of UK Employment. He acts primarily…
Yvonne Costello photo Yvonne CostelloYvonne is a partner specialising in general commercial and corporate law and advises…
Una Deretic photo Una DereticUna is a partner experienced in a wide range of corporate and…
Anthony Kerman photo Anthony Kerman  Andy is a Senior Counsel at the firm, he has considerable…
Peter Kohl photo Peter KohlPeter is a partner and Head of UK Corporate, he has more…
Mrs Sarnjit Lal photo Mrs Sarnjit LalSarnjit Lal has more than 20 years’ experience in fraud and major…
Daniel O Daniel O"ConnellDaniel is Partner and Leader Europe, he is a skilled corporate lawyer…
Martin O'Donoghue photo Martin O'DonoghueMartin is a Partner specialising in mergers and acquisitions, business purchases and…
Claudia Otto photo Claudia OttoClaudia is a Partner advising a diverse client base of property investors,…
Robert Paydon photo Robert PaydonRobert is Partner and Head of UK Commercial Litigation, he is an…
Robin Pickworth photo Robin PickworthRobin is a Partner specialising in commercial litigation, with extensive experience of…
Emma Shaw photo Emma ShawEmma is an Associate Solicitor in the Sports and Commercial Litigation Departments. …
Zane Shihab photo Zane ShihabZane is a Partner and the Head of UK Sport, IP &…
David Wise photo David WisePartner/Solicitor advocate (Higher Courts Civil Proceedings) and Head of UK Real Estate…
Coral Yu photo Coral YuCoral is an Associate Solicitor in the Corporate and Capital Markets team. …
Joan Yu photo Joan YuJoan is a Partner and Head of UK Capital Markets. Joan’s practice…

At Armstrong Teasdale, we define diversity, equity and inclusion (DEI) broadly and focus on helping professionals of all races, religions, national origins, gender identities, ethnicities, sexual orientations and physical abilities feel a sense of belonging. DEI are core values of the firm, and we recognize the richness they bring to our workplace.

More than policies and written goals, we value inclusion in practice, presenting opportunities for attorneys and staff to participate in engaging dialogue through resource groups such as the Diverse Professionals Group, Parent Resource Group, Veterans and Military Service Group and Women’s Inclusion Network (WIN), as well as through firmwide initiatives that challenge us and help us recruit, support and retain diverse professionals. From training and workshops to mentoring opportunities and social events, we are committed to promoting inclusivity within the legal profession. Such key initiatives are implemented from the top down, driven by the firm’s Chief Diversity Officer and other leaders.

As part of our commitment to inclusion, we have a dedicated DEI Department, which reports directly to the firm’s Executive Committee. Our Inclusion Committee also holds a significant role in the firm and reports to the Executive Committee on various activities and initiatives. Both initiatives enable us to continue holding ourselves accountable for this core value at the highest levels of firm management. We also distribute an annual inclusion report for further accountability.

We are committed to diversity within our client teams, ensuring that team leaders, supporting attorneys and professional staff are diverse in compliance with legal industry standards. Our clients consistently challenge us to align with diversity initiatives, and we take the mandate seriously. Bringing people with different experiences and opinions to the table enables us to better serve our clients.

The firm is also actively involved with various affinity groups, community and civic organizations that focus on driving DEI through various events and conferences across the country.

TESTIMONIAL (SPORT): “The expert, pragmatic and responsive team at Kerman & Co stands out for its expertise in ticketing and sports sponsorship.”

“I cannot recommend Kerman & Co more highly. The intelligence, patience and great understanding of sports law demonstrated by the team, has helped advise me on many complicated matters”.

TESTIMONIAL (M&A): “Kerman & Co were invaluable to us during the transaction. Their expertise, commercial approach and responsiveness ensured a smooth process. Their team was personable and easy to deal with, and I wouldn’t hesitate to recommend them to others.”

“Their experience advising listed companies with assets in emerging markets and completing cross-border transactions is second to none”.

TESTIMONIAL (Capital Markets): “We have a very close working relationship with Kerman & Co and their advice and commitment during this transaction was invaluable. They are an extension of our in-house team and they have contributed greatly to the growth of our business, since its inception.”

“We were provided with incisive advice and guidance from the outset, which made the process near enough seamless. We would have no hesitation in recommending their services, especially to those operating public companies, where the Kerman team really does excel.”

TESTIMONIAL (Employment): “In a pretty stressful situation Jonathan was superb and really guided us through the ups and downs. I am delighted we achieved the result we hoped for.”

“Expert, pragmatic and responsive team.”

TESTIMONIAL (Private Client): “I have the highest regard for Kerman & Co and the services you have given me and my family.”

“An outstanding all-round service from Kerman & Co”.

TESTIMONIAL (Dispute Resolution): “They are very good at resolving issues, they know how business actually works in the real world.”

“We were very pleased to have Kerman & Co in our corner!”

TESTIMONIAL (Real Estate): “Really value the institutional knowledge Kerman & Co have of our property portfolio, they really are an extension of our in-house team.”

“Deliver a very consistent service across the board, also take pride in developing personal relationships, which is important to us.”

Daniel O’Connell, Partner and Leader – Europe

Armstrong Teasdale Partner and Leader – Europe Daniel O’Connell explains the firm’s investment in growth and strategic vision for the future.

What do you see as the main points that differentiate Armstrong Teasdale LLP from your competitors?

Armstrong Teasdale is committed to strategic growth and putting its people first, which are attributes that attracted me to the firm and ultimately resulted in the combination of Kerman & Co and Armstrong Teasdale in February 2021. I believe our clients would share in those sentiments. The firm has been tremendously successful in growing at scale in recent years to remain competitive in the marketplace. Just as we’ve seen shifts in the U.K., our U.S. counterparts have witnessed similar significant moves and consolidation in the legal field. Our clients around the world have certainly benefitted from our expanded footprint and service offerings, especially as we look at cross-border work. We’re fortunate to have some of the most talented legal practitioners on our team, with deep experience across the areas in which we’ve been recognized by the Legal 500, and beyond. Armstrong Teasdale has the collegial atmosphere of a smaller firm, and the depth in resources of a larger firm, and that duality – that balance and commitment to advancing the business of law – sets us apart.

Which practices do you see growing in the next 12 months? What are the drivers behind that?

By virtue of our firm’s recent growth, I am confident our cross-border work will continue to expand, especially as we look at international arbitration, insolvency and restructuring and intellectual property. These are all areas that we’re looking to amplify by adding more lawyers, especially in the U.K. As an example, we are looking to add a robust patent practice in the U.K. to extend the firm’s globally recognized prosecution practice. Given the global pandemic, I also expect employment issues will continue to rage on as employers face unique challenges relating to remote working.

What’s the main change you’ve made in the firm that will benefit clients?

Our evolving footprint has already provided significant benefit to our clients around the world and will only continue to do so as we further grow and invest in our teams. In the past two and a half years, Armstrong Teasdale has been fortunate to have opened eight offices in various locations throughout the U.S., and most recently, in London. The combination has also provided our U.K.-based attorneys with additional internal resources to support our client’s objectives, such as its dedicated Diversity, Equity and Inclusion department and its Client CultivATion program.

Is technology changing the way you interact with your clients, and the services you can provide them?

Since the onset of the global pandemic in 2020, we have had to increasingly rely on technology to do business. In some sense, this has strengthened our relationships with clients, as we’re able to connect more regularly face-to-face across international borders. It’s also presented opportunities for us to evaluate and improve upon the technology and service offerings we have in place to support our practice areas around the world.

Can you give us a practical example of how you have helped a client to add value to their business?

We continue to provide our clients with consistent educational opportunities that add value to their business and aid in the decision-making process. In just six months since joining Armstrong Teasdale, we have offered four different seminars with combined hundreds of attendees and issued roughly a dozen client advisories regarding important developments and changes in the law.

Are clients looking for stability and strategic direction from their law firms – where do you see the firm in three year’s time?

In January of 2020, AT set forth six key goals as part of a five-year strategic plan that will carry the firm into the future. Paired with our recent growth, this speaks to both our stability and commitment to driving the direction of the firm.

I am looking forward to broadening our client base across jurisdictions in the U.K. and Europe, and in the U.S., and leveraging our key commercial, media and sport experience especially to grow the firm’s client roster. We are already executing on plans to grow our London office and are continuing to integrate our practices across international borders. Further, we will continue to entertain opportunities in other European markets that make sense for us financially and will benefit our clients.